Dosing Unit Safety Mechanism for Automatic Detergent Tablet Release
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Solution Overview
Problem
Existing household appliances like dishwashers and washing machines require manual detergent filling, which can lead to incorrect dosing and user inconvenience, and pose safety risks due to potential skin and eye irritation from detergents.
Innovation Solution
A dosing unit with a predefined switching mechanism that requires a specific tool for safe and controlled release of detergent tablets, preventing access with bare hands or common tools, and ensuring automatic dosing with a safety portion to prevent unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a dosing device is made accessible for manual operation, then ease of operation is improved, but safety is worsened due to risk of skin contact and accidental access by children
Solution Approach 1:
The patent introduces a safety portion as an intermediary element between the user and the detergent tablets. This safety portion requires a specific tool to access, thereby mediating the interaction and preventing direct contact with harmful detergent substances while still allowing authorized operation.
Solution Approach 2:
The patent creates a copy or representation of the switching mechanism that is accessible only through a specific tool. The safety portion replicates the functional interface but adds a protective layer, allowing the dosing device to be operated without direct exposure to harmful substances.
2Ease of operation
If a dosing device allows easy access for refilling and operation, then ease of operation is improved, but reliability is worsened due to unwanted switching and accidental access
Solution Approach 1:
The safety portion acts as a mediator that distinguishes between authorized and unauthorized access attempts. It requires a specific tool to activate the predefined switching mechanism, thereby ensuring that only intentional and proper operations can switch the dosing device, preventing accidental or unwanted switching.
Solution Approach 2:
The patent applies preliminary anti-action by designing the safety portion to counteract potential unwanted switching before it can occur. The specific tool requirement creates a preliminary barrier that prevents unauthorized activation, ensuring that only deliberate and correct operations can trigger the switching mechanism.
3Object-affected harmful factors
If a safety mechanism requiring a specific tool is implemented, then safety is improved by preventing accidental access, but device complexity is worsened
Solution Approach 1:
The patent segments the dosing device into distinct functional portions: the dosing device itself and the safety portion. This segmentation allows the safety mechanism to be added as a separate modular component with the specific tool requirement, rather than integrating complexity throughout the entire device structure.
Solution Approach 2:
Instead of making the entire dosing device complex and secure, the patent inverts the approach by keeping the dosing device simple and accessible, while adding the complexity only to the safety portion through the specific tool requirement. This reverses where the complexity is located, maintaining simplicity in the primary function while adding security where needed.
Data Source
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AI summary
The invention relates to a dosing unit (18, 118, 218) for an automatic dosing system of a water-bearing household appliance, in particular a dishwasher or washing machine, configured for dosing at least one of a plurality of detergent tablets stored in a storage cartridge (30, 130, 230), comprising a dosing device (20, 120, 220) configured for picking the at least one detergent tablet from the plurality and releasing the at least one detergent tablet by temporarily switching by a predefined switching mechanism from a closed state to a release state, wherein the dosing device (20, 120, 220) comprises a safety portion (24, 124, 224) for preventing an unwanted switching. Moreover also a water-bearing household appliance comprising the dosing unit and a method of dosing is disclosed.